wt.pds
Class ChunkLobHandler

java.lang.Object
  wt.pds.AbstractLobHandler
      wt.pds.ChunkLobHandler

All Implemented Interfaces:

LobHandler

Direct Known Subclasses:

DBMSLobHandler, StandardLobHandler81

public abstract class ChunkLobHandler

extends AbstractLobHandler

This abstract class provides capabilities for reading and writing Lob data in chunks. Subclass implementations must provide a mechanism for this capability.

Supported API: false

Extendable: false

Field Summary

private static String	CLASSNAME
private static String	RESOURCE

Fields inherited from class wt.pds.AbstractLobHandler

DEBUG

Constructor Summary

ChunkLobHandler()

Method Summary

protected abstract long	getLobLength(WTConnection a_connection, Object a_blob) Returns the length of the specified LOB.
long	setLob(WTConnection a_connection, LobLocator a_lobLocator, InputStream a_inputStream) Set the data in the InputStream to the specified LOB.
void	setLob(WTConnection a_connection, LobLocator a_lobLocator, InputStream a_inputStream, long a_length) Set the data in the InputStream to the specified LOB.
protected abstract void	setLobLength(WTConnection a_connection, Object a_blob, long a_length) Set the length of the specified LOB.
void	setObjectAsLob(WTConnection a_connection, LobLocator a_lobLocator, Object a_object) Set the object as LOB.
protected abstract void	write(WTConnection a_connection, Object a_blob, long a_blobOffset, InputStream a_inputStream, long a_length) Writes the data to the specified LOB.

Methods inherited from class wt.pds.AbstractLobHandler

findLocator, getBlob, getLob, getLobAsByteArray, getLobAsObject, setBlob, streamAvailable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

Constructor Detail

ChunkLobHandler

public ChunkLobHandler()

Method Detail

setLobLength

protected abstract void setLobLength(WTConnection a_connection,
                                     Object a_blob,
                                     long a_length)
                              throws DatastoreException

Set the length of the specified LOB.

Supported API: false

Parameters:

a_connection -

a_blob -

a_length -

Throws:

DatastoreException

getLobLength

protected abstract long getLobLength(WTConnection a_connection,
                                     Object a_blob)
                              throws DatastoreException

Returns the length of the specified LOB.

Supported API: false

Parameters:

a_connection -

a_blob -

Returns:

long

Throws:

DatastoreException

write

protected abstract void write(WTConnection a_connection,
                              Object a_blob,
                              long a_blobOffset,
                              InputStream a_inputStream,
                              long a_length)
                       throws WTIOException

Writes the data to the specified LOB.

Supported API: false

Parameters:

a_connection - Connection to the database.

a_blob - Blob object reference to the data

a_blobOffset - Offset into the Blob data to begin writing

a_inputStream - Offset into the buffer data to begin writing from

a_length - Number of bytes to write

Throws:

WTIOException

setLob

public void setLob(WTConnection a_connection,
                   LobLocator a_lobLocator,
                   InputStream a_inputStream,
                   long a_length)
            throws DatastoreException

Set the data in the InputStream to the specified LOB.

Supported API: false

Specified by:

setLob in interface LobHandler

Specified by:

setLob in class AbstractLobHandler

Parameters:

a_connection - Connection to the database

a_lobLocator - specifies the Lob column

a_inputStream - Data stream for input to the lob

a_length - Number of bytes to set

Throws:

DatastoreException

setLob

public long setLob(WTConnection a_connection,
                   LobLocator a_lobLocator,
                   InputStream a_inputStream)
            throws DatastoreException

Set the data in the InputStream to the specified LOB.

Supported API: false

Specified by:

setLob in interface LobHandler

Specified by:

setLob in class AbstractLobHandler

Parameters:

a_connection - Connection to the database

a_lobLocator - specifies the Lob column

a_inputStream - Data stream for input to the lob

Returns:

long

Throws:

DatastoreException

setObjectAsLob

public void setObjectAsLob(WTConnection a_connection,
                           LobLocator a_lobLocator,
                           Object a_object)
                    throws DatastoreException

Set the object as LOB.

Supported API: false

Specified by:

setObjectAsLob in interface LobHandler

Specified by:

setObjectAsLob in class AbstractLobHandler

Parameters:

a_connection - Connection to the database

a_lobLocator - specifies the Lob column

a_object - Object to set

Throws:

DatastoreException